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Reference Terms
from Wikipedia, the free encyclopedia

Special relativity

Special relativity inter-relates space and time in such a way that the speed of light is constant, and the theory leads to situations where two observers can disagree over time intervals and distances between events, but without ever disagreeing about what events actually happened.

Note:   The above text is excerpted from the Wikipedia article "Special relativity", which has been released under the GNU Free Documentation License.
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